App icons generic on watch 8

I guess the next step would be to unpair your watch from your iPhone, which will cause a new backup. Then pair it again, which will let you restore your backup back to the phone.

This link explains how to do that --> Unpair and erase your Apple Watch - Apple Support

That is odd. Either restart your watch and if that doesn't work, Force Restart your Watch.

To restart, press the elongated side power button until you see the SOS page. Look in the upper right hand corner for a power button. Tap the power button, which will take you to a swipe to power off. Swipe to power off and wait a minute, then hold the same power button and keep holding it until the Apple Logo appears. Sign in when prompted and see if the icons have resume their normal appearance.

If that doesn't do the trick, Force Restart your watch by pressing and holding BOTH the digital crown and elongated power buttons at the SAME TIME. Keep holding both in until the screen goes dark and keep holding them until you see the Apple Logo, then let go. Sign back in when prompted and see if the icons have resumed their normal appearance.

Take a screenshot to show us what you're seeing. To take a screenshot, press the digital crown and power button at the same time quickly and you'll hear the camera shutter sound.

What happens when you tap one of them?

After you tap it and it opens an app, does the icon return to the generic looks as shown?

Thank you for coming back and letting me know it solved this for you. Sorry you had to go through the process, but now things are working as they should.

Take care, Jim!